1st time distributor swap

Trying to get ready for a road trip and decided to buy a new distributor and keep the old as a spare. From Bus Depot I ordered the Bosch with vacuum advance (svda?). Which I understand to be more "original". Anyway, I haven't done this before and I'm not seeing where a vacuum line would attach to the carburetor. So here's the current set up.

Here's the left side of the carburetor.

Is that where it would go? I'm guessing you have to unscrew that piece and pop out the gold plug in the middle?

I have both the Bentley and Muir books and I've searched the site first. Oh wait a sec, I forgot I'm not on Samba   

Here's the new distributor:

If there is a vacuum port it should be near the mixture screw.

Thanks! Is the mixture screw on the left or right side of the carb?

Should be on the same side as the idle stop screw. It's a thumb screw in the base of the carb.